ARUP's Laboratory Test Directory

Glutamic Acid Decarboxylase Antibody : 2001771

Mnemonic: GAD-AB

Ordering Recommendation: Not recommended in routine evaluation or management of diabetes mellitus (DM). Glutamic Acid Decarboxylase Antibody (GAD) and IA-2 Antibody (insulinoma antigen 2) (0050202) recommended for initial screening of suspected cases of type 1 DM.
Methodology: Quantitative Enzyme-Linked Immunosorbent Assay
Performed: Sun-Fri
Reported: 1-3 days
Specimen Required: Collect: Serum separator tube.

Specimen Preparation: Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: Plasma. Grossly hemolyzed specimens.

Stability (collection to initiation of testing): Ambient: 24 hours; Refrigerated: 1 week; Frozen: 3 months

Reference Interval:
0.0-5.0 IU/mL
Interpretive Data: A value greater than 5.0 IU/mL is considered positive for Glutamic Acid Decarboxylase Antibody.
CPT Code(s): 83516
Cross References: Beta-Cell Autoantibody to GAD 65 (Glutamic Acid Decarboxylase Antibody) , GAD Antibody (Glutamic Acid Decarboxylase Antibody) , GAD-65 (Glutamic Acid Decarboxylase Antibody)